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Breakwaters and closure dams: chapter 2
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Breakwaters and closure dams: chapter 2

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  • 1. Chapter 2: Positioning the subjectct5308 Breakwaters and Closure DamsH.J. VerhagenApril 12, 2012 1Faculty of Civil Engineering and GeosciencesVermelding onderdeel organisatieSection Hydraulic Engineering
  • 2. Focus on:• Technical aspects• Technical impacts onlyApril 12, 2012 2
  • 3. Breakwaters and Closure dams• Comparable items: • similar materials • similar execution methods• Differences: • load difference (wave action vs. currents) • life timeApril 12, 2012 3
  • 4. Characteristic values Type of structure H/Δdn Sandy beach >500 Gravel beach 20-500 Rock slope 6-20 Berm breakwater 3-6 (Stable) rubble mound breakwater 1-4 caisson <1April 12, 2012 4
  • 5. mound breakwater typesApril 12, 2012 5
  • 6. Monolithic breakwater typeApril 12, 2012 6
  • 7. Sometimes vertical wall is only option Cardiff Barrage 14 m tidal range (situation at high waterApril 12, 2012 7
  • 8. Composite breakwater typesApril 12, 2012 8
  • 9. Special breakwater typesApril 12, 2012 9
  • 10. Floating breakwater in Italy(Marina di Verbania, Lago Maggiore)April 12, 2012 10
  • 11. Floating breakwater in ItalyApril 12, 2012 11
  • 12. Floating breakwater in ItalyApril 12, 2012 12
  • 13. Vertical screens(Royal Prince Alfred Yacht Club, Sydney, Australia)April 12, 2012 13
  • 14. Basic methods of closureApril 12, 2012 14
  • 15. Closure named after topographyApril 12, 2012 15
  • 16. Closures named after hydrologicconditionsApril 12, 2012 16
  • 17. closures named after materials used• stacking up willow mattresses (opzinken)• sand closure• clay or boulder clay closure• stone dam closure (rock closure)• caisson closureApril 12, 2012 17
  • 18. Pluimpot, TholenApril 12, 2012 18
  • 19. sand closureApril 12, 2012 19
  • 20. AfsluitdijkApril 12, 2012 20
  • 21. rock closureApril 12, 2012 21
  • 22. caisson closureApril 12, 2012 22
  • 23. Rubble mound breakwater atCittavecchiaApril 12, 2012 23
  • 24. Breakwater at CherbourgApril 12, 2012 24
  • 25. Breakwater at PlymouthApril 12, 2012 25
  • 26. Monolithic breakwater at DoverApril 12, 2012 26
  • 27. Breakwater at MarseillesApril 12, 2012 27
  • 28. Typical breakwater along theMediterranean coastApril 12, 2012 28
  • 29. Historical closures• Rhine damming (Wijk bij Duurstede)• Sloe closure (pakwerk)• HindeburgdamApril 12, 2012 29
  • 30. Walcheren, four gaps on one islandApril 12, 2012 30
  • 31. Development of erosion gulliesApril 12, 2012 31

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